What intervention strategies (direct or indirect) did Mr. Keating utilize in an attempt to alter the motivational state of his students?

Mr. Keating strived to get his students to think for themselves or become "free thinkers". He asked his students to question the world around them and turn both pleasure and pain into poetry. He wanted them to look at the world new ways. He wanted them to seize every day like it was their last: Carpe Deum!